This puzzle consists of three identical pieces which rather surprisingly interlock into an octahedron. Each piece is made from 3D printed spheres connected by cylinders, there are no notches, grooves, or latches holding it together! It is a fairly easy puzzle to put together, and by adding a thread on the top loop, it makes a nice addition to any Christmas tree. When assembled it measures 5 cm or 2 inches tip to tip.
One piece has a small loop on which to string it. String or thread for hanging not included.
Follow this link for a 1-page pdf with assembly instructions.